GMAT Question of the Day: Daily via email | Daily via Instagram New to GMAT Club? Watch this Video

It is currently 05 Aug 2020, 18:05

Close

GMAT Club Daily Prep

Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track
Your Progress

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Close

Request Expert Reply

Confirm Cancel

How many prime numbers between 1 and 100 are factors of 7,15

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:

Hide Tags

Find Similar Topics 
Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 65808
Re: How many prime numbers between 1 and 100 are factors of 7150  [#permalink]

Show Tags

New post 27 Jun 2018, 19:24
CEO
CEO
User avatar
V
Joined: 03 Jun 2019
Posts: 3362
Location: India
GMAT 1: 690 Q50 V34
WE: Engineering (Transportation)
Reviews Badge CAT Tests
Re: How many prime numbers between 1 and 100 are factors of 7,15  [#permalink]

Show Tags

New post 21 Aug 2019, 01:07
seofah wrote:
How many prime numbers between 1 and 100 are factors of 7,150?

A. One
B. Two
C. Three
D. Four
E. Five


How many prime numbers between 1 and 100 are factors of 7,150?
7150 = 2*5^2*11*13

Prime factors = {2,5,11,13}

IMO D
_________________
Kinshook Chaturvedi
Email: kinshook.chaturvedi@gmail.com
Intern
Intern
avatar
B
Joined: 23 Jun 2019
Posts: 5
Concentration: Finance, Organizational Behavior
How many prime numbers between 1 and 100 are factors of 7,15  [#permalink]

Show Tags

New post 21 Aug 2019, 05:32
This is how i solved it
7150/2 = 3757
3575/5 = 715 (since sum of 3575 is 20 so it is not divisible by 3)
715/5 = 143
143/11 = 13 (since 143 not divisible by 7)

So equation will be 2*5^2*11*13

I think this way you can easily solve such kind of questions.
Intern
Intern
User avatar
B
Joined: 06 Mar 2019
Posts: 46
Schools: IMD '21
Re: How many prime numbers between 1 and 100 are factors of 7,15  [#permalink]

Show Tags

New post 22 Sep 2019, 22:25
I first simplified 7,150 to 715 x 10, then i proceeded with the prime factorization tree for 715. This made things much easier for me.
GMAT Club Bot
Re: How many prime numbers between 1 and 100 are factors of 7,15   [#permalink] 22 Sep 2019, 22:25

Go to page   Previous    1   2   [ 24 posts ] 

How many prime numbers between 1 and 100 are factors of 7,15

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  





cron

Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne